1 files changed, 124 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/nsprpub/pr/src/md/windows/ntinrval.c b/src/libs/xpcom18a4/nsprpub/pr/src/md/windows/ntinrval.c
new file mode 100644
index 00000000..494f6e83
--- /dev/null
+++ b/src/libs/xpcom18a4/nsprpub/pr/src/md/windows/ntinrval.c
@@ -0,0 +1,124 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is the Netscape Portable Runtime (NSPR).
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1998-2000
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+/*
+ * NT interval timers
+ *
+ */
+
+#include "primpl.h"
+
+#if defined(WIN16)
+#include <win/compobj.h>
+#define QueryPerformanceFrequency(x)   FALSE
+#define QueryPerformanceCounter(x)     FALSE
+#endif
+
+static PRIntn _nt_bitShift = 0;
+static PRInt32 _nt_ticksPerSec = -1;
+
+void
+_PR_MD_INTERVAL_INIT()
+{
+    LARGE_INTEGER count;
+
+    if (QueryPerformanceFrequency(&count)) {
+        /*
+         * HighPart is signed (LONG).  Assert that its sign bit is 0
+         * because we will be right shifting it.  LowPart is unsigned
+         * (DWORD).
+         */
+        PR_ASSERT(count.HighPart >= 0);
+        while(count.HighPart) {
+            count.LowPart = (count.HighPart << 31) + (count.LowPart >> 1);
+            count.HighPart >>= 1;
+            _nt_bitShift++;
+        }
+        while(count.LowPart > PR_INTERVAL_MAX) {
+            count.LowPart >>= 1;
+            _nt_bitShift++;
+        }
+
+        /*
+         * We can't use the performance counter if after
+         * normalization we are left with fewer than 32 bits.
+         */
+        if (_nt_bitShift <= 32) {
+            _nt_ticksPerSec = count.LowPart;
+            PR_ASSERT(_nt_ticksPerSec > PR_INTERVAL_MIN);
+            return;
+        }
+    }
+    _nt_ticksPerSec = -1;
+}
+
+PRIntervalTime 
+_PR_MD_GET_INTERVAL()
+{
+    LARGE_INTEGER count;
+
+   /* Sadly; nspr requires the interval to range from 1000 ticks per second
+    * to only 100000 ticks per second; QueryPerformanceCounter is too high
+    * resolution...
+    */
+    if (_nt_ticksPerSec != -1) {
+        (void)QueryPerformanceCounter(&count);
+        PR_ASSERT(_nt_bitShift <= 32);
+        if (_nt_bitShift == 32) {
+            return (PRUint32)count.HighPart;
+        } else {
+            return (PRUint32)((count.HighPart << (32 - _nt_bitShift))
+                    + (count.LowPart >> _nt_bitShift));
+        }
+    } else
+#if defined(__MINGW32__)
+        return time();
+#elif defined(WIN16)
+        return clock();        /* milliseconds since application start */
+#else
+        return GetTickCount();  /* milliseconds since system start */
+#endif
+}
+
+PRIntervalTime 
+_PR_MD_INTERVAL_PER_SEC()
+{
+    if (_nt_ticksPerSec != -1)
+        return _nt_ticksPerSec;
+    else
+        return 1000;
+}